Im just showing my own opinion based on what I understood from season 1 and 2. First Heeseo, I think he's a bit confused by his own emotions in season 2, as clearly indicated in season 1 he had a lot of mental problems, almost self deleting, the only thing keeping him alive was knowing Mr,Cha was on his side. When he found out that he's mom got deleted than self deleted, he finally truely broke down, only for Mr.Cha to abandoned him at that moment for his own situation. He felt truely betrayed, as the only person he cared about left him, there he tried to delete him and himself. As seeing his track of behaviour, it's only natural that he'll target his obsession with is Mr.Cha. Now Mr.Cha, he's used to taking care of Heeson, seeing as a kid, he feels bad for him still seeing him as the child who lost their mother, the child he had to save. So let's him get away with a lot, while try to understand him over his own benefit. I think to understand this manwha you have to understand the characters first,
she's the one this psycho should be directing his anger and revenge towards. Why you got an innocent fucking man chained up and abusing him?? the only person that gave a shit about you! but no he was an easy target for your guilt-tripping and gaslighting and every other horrible action! go kidnap the bitch who's actually responsible! I feel so bad for Mr cha.. not only is he a victim of this bastad Heeseo, but also his own mother's schemes. I have a feeling his mom plotted all of this.. from the beginning, she's been using him as a scapegoat. Her and Heeseo should kill each other!
and what is up with this nauseating domestic vibes?!? are we supposed to think it's cute or something?